Derung, Dulong (simplified Chinese: 独龙; traditional Chinese: 獨龍; pinyin: Dúlóng) or Trung is the Sino-Tibetan language of the Derung people of China. It is an unwritten language. It is thought that the Derung and Nu people are of the same origin and speak somewhat the same language. They share the same kinship terminology as well as other cultural features.
Melam, Metu, Tamalu, and Tukiumu may be Derung dialects. They are not included in the speaker total above.
Dulongyu Jianzhi (1986) lists two main dialects of Dulong.
- Dulong River dialect: Dulong River watershed, primarily in Dulongjiang Township 独龙江乡, Gongshan County, Yunnan, including in Villages 1–4, District 4; the dialect spoken in Village 4 is very different from the dialect spoken in villages 1–3. 4,700 speakers. Note: Villages 1–4 are arrayed north to south, with Village 1 the northernmost, and Village 4 the southernmost. In other writings, these "villages" are called townships.
- Nujiang dialect: Gongshan County, Yunnan (including in Bingzhongluo Township 丙中洛乡, District 1, Nujiang) and Chawalong Township, Zayü County, Tibet. 6,000 speakers.
- Derung at Ethnologue (18th ed., 2015)
- Hammarström, Harald; Forkel, Robert; Haspelmath, Martin; Bank, Sebastian, eds. (2016). "Drung". Glottolog 2.7. Jena: Max Planck Institute for the Science of Human History.
- Duo Ji & Sun Hongkai. 2009. "Sketch on basic characteristics and dialectology of the Dulong language". In Studies on Dulong society and history, vol. 2, 160–183. Beijing: Ethnic Publishing House. ISBN 9787105087983
- ELAR archive of Documentation and description of Dulong (Trung)